Regenerative gas-furnace.



No. 760,263. PATENTEDMAY 1'7, 1904.

` F. SIEMENS. RBGENERATIVE GAS PURNAE.

l APPLICATION FILED AUG. 11l 1902.

N0 MODEL.

11o. 760,263. PATENTBD MAY 17, 1904. F. SIEMENS. REGBNERATIVE GAS PURNAGB.

APPLICATION' IILED AUG. 11, 1902. N0 MODEL. 2 SHEETS-SHEET 2.

Bry /W/Mw MW JW f/wlf- UNITED STATES Patented May 17, 1904.

FREDERICK SIEMENS, OF DRESDEN, GERMANY.

REGENERATIVE GAS-FUFINACE.

SPECIFICATION forming part of Letters Patent N o. 760,263, dated May 17, 1904.

Application led August 1l, 1902. Serial No. 119,350. lNo model.)

To @ZZ whom 7115 may con/ecru:

Be it known that I, FREDERICK SIEMnNs, a

subject of the King of Saxony, residing at 4 Liebigstrasse, Dresden, in the Empire of Germany, have invented a certain new and useful Improvement in Regenerative Gas-Iiurnaces, (for which I have applied for a patent in Great Britain, dated January 10, 1902, No. 770,) of which the following is aspeciication.

In the specifications to United States Patents Nos. 590,864 and 624,388 are described regenerative gasfurnaces having their gasproducers in close proximity to the furnacechambers or in the same structures with them and provided with both gas and air reversingvalves. Usually the gas as it is evolved from these producers is at a comparatively low temperature. Sometimes, however, it is necessary or advantageous to supply the gas to the furnace at a temperature higher than that at which it emerges from the producers.

The present invention relates to means of increasing the temperature of the gas as it passes from the producers to the furnace, and this is accomplished in the following manner: rI he gas after passing from the producers through the controlling-valve passes along a gas port or iiue which runs parallel-or near to the liuc that conducts highly-heated air from the regenerative-chamber to the furnace. At one or more parts of the gas-flue, and preferably near to the furnace-chamber itself, one

y or more holes are made through the Hue-wall,

so that streams of hot air can enter the gasllue and mix with portions of the gas, creatinga iiame or Haines by which the temperature of the main body of` the gas is raised on its way to the furnace. Usually the hot air is at a higher pressure than the gas, so that the air passes in jets into the gas-Hue. If, however, it should happen that the gas is ata higher pressure than the air, jets of gas can issue from the gas-liuc and form fiamcs in the air-flue, thus raising the temperature of the main body of the air before it reaches the furnace-chamber.

Figures l to 8l show various arrangements of intercommunicating air and gas lines for heating' the gas after it has passed the gasvalve or the air after it has passed the airvalve and before it enters the furnace-chamber.

Fig. 1 shows a cross-section through the gas-fine and the air-'flue Z, leadingto the heating or melting chamber. There are one or more lopenings m formed in the side wall of the gas-flue n, through which a portion of the highly-heated-air supply coming from the regenerators passes in among the gas-supply, the air-supply being at a somewhat higher pressure than the gas-suppl y. The resulting combustion of the entering jets of air with a portion of the gas has the effect of heating the main body of the gas to the required higher degree before it enters the heating' or melting chamber. Should the pressure of the gassupply be greater than that ofthe air-supply, jets of gas enter the air-flue, and the resulting combustion of the gas with a portion of the air heats the main body of the air to a higher temperature before it enters the heating or melting chamber. In Fig. 2 the highly-heated air enters the gas-i'lue/f through several small openings a at the top through one or more openings in the side of the gas-Hue. In Fig. 3 the air enters through openings 'n on three sides of the gas-flue, while in Fig. 4 the inletopenings 'nl are provided on all four sides thereof.

Fig. 5 shows a cylindrical air-line I, with a concentric cylindrical gas-Hue inside, having openings arranged all round it. In the arrangement shown in cross-section in Fig. 6 and part longitudinal section in Fig. 7 there are two gas-fines /ff 1, surrounded by the air- Iiue l and communicating therewith bymcans of openings a a on both sides and at the top, while in the arrangement shown in cross-section in Fig. 8 and longitudinal section in Fig. 8 the gas-flue 7:: communicates through openings la with the air-lines Z arranged above and below the same.

Having thus described the nature of this invention and the best means I know of carrying the same into practical effect, I claim- 1. In a regenerative gas-furnace, means for increasing the temperature oi the producergas, said means consisting' of a gas-tine andan air-flue for conducting highly-heated air, the wall of one flue forming the dividing-walls be- IDO t'ween the lues, said iues communicating with each other at intervals throughout their length by portsin the dividingwall through which a portion of the contents of one flue may issue into the other flue and combining with a portion of the contents thereotl produce flames by which the said contents are heated, substantially as described.

2. lIn a regenerative gas-furnace, means for increasing the temperature of the air supplied thereto, said means consisting or' a gas-Hue and an air-flue for conducting highly-heated air, the wall of one flue forming the dividingwall between the flues, said fiues communicatf flue forming the dividing-wall between the gas and air iues,vsaid iues communicating with each other at intervals, throughout their length, by ports in the dividing-wall through whichv a portion or' the contents of one iiue may issue into the other flue and combining with a portion of the contents thereof produce i'lames by which the said contents are heated, substantially as described.

4. In a regenerative gas-furnace, means for increasing the temperature of the producergas, said'means consisting of a gas-flue and an air-flue for conducting highly-heated air, the wall of one flue forming the dividing-wall between the iiues, said i'lues communicating with each other` at intervals throughout their length by ports in the dividing-wall through which a portion or' the contents of one i'lue may issue into the other iue and combining with a portion of the contents thereof produce iames by which the said contents are heated, and a gasvalve-connected to the gas-flue at a point beyond the said ports inthe dividing-wall of the ilues, substantially as described.

In testimony whereof I have hereunto set my hand in presence oftwo subscribing witnesses.

FREDERICK SIEMENS.

Vi'wtnesses:

FRANZ RICHARD HERTEL, PAUL SCHILLING. 

